From 1fb8aae79ba565b8dfe4bdfd1eb33a470f5aebc4 Mon Sep 17 00:00:00 2001
From: kdrag0n <dragon@khronodragon.com>
Date: Sun, 7 Oct 2018 17:16:40 -0700
Subject: [PATCH] printk: silence TEE logs from userspace

- Spams logs, pushing out useful messages
- Reduces security because it exposes internal information

Signed-off-by: kdrag0n <dragon@khronodragon.com>
---
 kernel/printk/printk.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index e876334a8..f266b7bc9 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -802,7 +802,8 @@ static ssize_t devkmsg_write(struct kiocb *iocb, struct iov_iter *from)
 		}
 	}
 
-	if (strncmp("healthd", line, 7) == 0) {
+	if (unlikely(strncmp("healthd", line, 7) == 0 || strncmp("Trustonic TEE", line, 13) == 0))
+	{
 		return len;
 	}